Electric heater.



'823,372 iiled' March 9, 1914i, or' which vlr'roni, whereby the element first n Wirren sir-aref 5ST FFCE.

WILLIM S.. HAEVJAY, JR., Sli 'NEW' RGCEELLE, NEW Y'RF..

nrino'rnio aisance?.

Specification of Letters latent.

Patentedict. 5, 1915.

Application led may 2G, will. Serial Eo. 839,672.

have invented certain new and useful lin-- provenients in Electric Heaters, being continuation of my application Serti h following is a specification, reference be had tothe accompanying drawings, fwn;- ing a part thereof.

My invention relates to electric heaters and has for one of its objectsto prov'ide a simple and eilicient device of this character that shall possess advantages usually pei taining to widely dii'i'erent heaters and not hitherto attainable in a single'heater.'

Another object is to provide a heater unit that shall. comprise a relatively inassiA support of heat absorbing material such soapstone, and a heater element secured thereto but spaced at a short distance therev be raised to a high temperature upon the plicationA of electric current, and useful heat-immediately radiated there-fron' i n heat gradually imparted to the sorbing body until its temperature is and it coperates with and boosts the ten perature of the heating element; and finally useful heat drawngradually from the heat absorbing material after the electric cnergy is cut oli".

Other objects and advantages of my in vention will be set forth hereinafter, and in order that my invention may be thoroughly understood, will proceed to describe the saine in thel following specification and then point out the novel features thereof in, appended claims.

Referring to the drawings: Figure 1 is a plan view of a heater embodying niy invention. The saine heater is-shown in partial sectional end and side elevations respectively in Figs. 2 and 3. Fig. 4 is a perspective view oi one of the clips utilized to support the resistance conductor of the heater. Fig. 5 is a side elevation shown partially in sectionof a heater structure enr bodying a pair of heaters of the character shown in Figs. 1, 2 and 8, together with a suitable frarne and connections for uniting them into a unitary structure. A bottoni plan View of the same structure is shown in Fig. 6.

With special reference to Figs. i, 2 and thev heater here shown is complete in et 1 id in other -o t insulating and. plurality zi rib resi 'A pair n: n. tnrugh the .te n. ar its respective ends and adjace ci" its sides -as shown in Fig.

i the stndshas a. square winch itsinto one or rectangular hea gi'irovided i s.y pair oi! r "n serted. 'l hey soldered in pia f ce conductors are ineiierably braised or 'Lilie resistance cenduc tors e supo in addition to the sup-- port nrni oy the terminals 13 and lli,

lios 18 which are similar position by 'Ys'. 2 and 3. s extend that the by a plurality of c to each oth i' l new ine th preerell neads of the clips or 'i a slot 2l into wliichlis set an lshaped supporting bracket preferably formed of sheetl metal. rifhe nut itself is also prefer' ably formed of sheet metal of somewhat heavier stock by `oldinga rectangular strip on itself. rlhe outwardly extending arm of the bracket 22 is provided with a notch, 23 and is folded inwardly with a tongue 24 extending laterally through the notch to proiide a double support for the resistance ribbon conductor. The holes through which the' clamping screws 19 extend are preferably located substantially in the center of the grooves 11 in the plate 10, the zigzag ribbon being mounted in sections directly over the grooves and the nuts 20 being shaped to tit into the grooves which pre* be used independentiy of z cuits terininating at the respective terminals lfd- 14.

0n the bach of the slab or plate l0 the terminal studs it-14 extend outwardly and are provided with the usual clamping and terminal nuts 25 by which circuit'conductors or bus-bars may be secured to and connected to the studs Referring to Figs. 5 and 6, more than one of the heaters of the preceding figures may be assembled into a'unitary structure by means 'of a supporting frame 26 which is built up of angle strips Z7 welded or other.- wise connected at their corners, a central transverse strip 28 which is welded to the side bars and longitudinal bars 29 which are secured to the traine by bolts 30 which extend through suitable holes 3l in the soapstone. The terminal studs of the respective heaters are interconnected by rigid connecting` sgiips 35 and 3'@ the studs at the eze `treniities of the complete structure being Aprovided with suitable 37-38 and 39 which conducting strips terminate and extend slightly beyond `ene end ci trie structure and are insulated from and secured to the frame in any suitable manner.

The'iraine is' suiliciently rigid to permit the structure to be handled as av unit and `'while l have shown the structure as consisting of two heaters any number may be united in a similar manner within the spirit and scope or" my invention@A and l intend that only such'liinitations be imposed as are indicated in the appended claims.

What l claim is:

l. A heater comprising a slab ci heat absorbing material, a heating conductor supported by said slab and arranged. substantially parallel to one of its surfaces, and means for spacing the heating conductor from the adjacent surface of the slab, whereby the heat transfer :troni ductor to the slab is effected largely by radiation.

2. An electric heater vcomprising a solid body of heat absorbing material vhaving a surface provided with a plurality of substantially parallel grooves, spaced supports secured to the body in said grooves and eX- tending outwardly from the surface, and a heating conductor arranged close to but spaced from the surface of the body and mounted on said supports.

8. A heater comprising a slab of electric insulating and heat absorbing material having a plurality of substantially parallel grooves, angle supports inountedhin lsaid grooves and secured to the slab7 and Ya zigzag resistance ribbon secured to said supports and mounted on edge relative to the surface of the slab, said ribbon being 'adjacent to but spaced slightly from the surface of the slab whereby the heat transfer from the re" sistance conductor to the slab is ell'ected largely by radiation.

ln testimony whereof l have hereunto set my hand in the presence of tnf'c subscribing witnesses, this 18 day of May, 1914.

WILLAM S. HADAWAY, Jn.

Witnesses l?. GRAVES, ETHEL (ionen.

the heating con- 

